fio . before: Processor: Intel Core i7-4790K @ 4.00GHz (4 Cores), Motherboard: MSI Z97 GAMING 7 (MS-7916) v1.0, Chipset: Intel Haswell DRAM, Memory: 16384MB, Disk: 1000GB Western Digital WD10EZEX-21M + 120GB OCZ VERTEX3 MI, Graphics: Zotac NVIDIA GeForce GTX 780 3072MB (862/3004MHz), Audio: Realtek ALC1150, Network: Atheros Device e091 OS: SteamOS 1.0, Kernel: 3.10-5-amd64 (x86_64), Desktop: GNOME 3.4.2.1, Display Server: X Server 1.12.4, Display Driver: NVIDIA 352.09, OpenGL: 4.5.0, Compiler: GCC 4.7.2, File-System: ext4, Screen Resolution: 1920x1080 AFTER: Processor: Intel Core i7-4790K @ 4.00GHz (4 Cores), Motherboard: MSI Z97 GAMING 7 (MS-7916) v1.0, Chipset: Intel Haswell DRAM, Memory: 16384MB, Disk: 1000GB Western Digital WD10EZEX-21M + 120GB OCZ VERTEX3 MI, Graphics: Zotac NVIDIA GeForce GTX 780 3072MB (862/3004MHz), Audio: Realtek ALC1150, Network: Atheros Device e091 OS: SteamOS 1.0, Kernel: 3.10-5-amd64 (x86_64), Desktop: GNOME 3.4.2.1, Display Server: X Server 1.12.4, Display Driver: NVIDIA 352.09, OpenGL: 4.5.0, Compiler: GCC 4.7.2, File-System: ext4, Screen Resolution: 1920x1080 1: Processor: Intel Core i7-4790K @ 4.00GHz (4 Cores), Motherboard: MSI Z97 GAMING 7 (MS-7916) v1.0, Chipset: Intel Haswell DRAM, Memory: 16384MB, Disk: 1000GB Western Digital WD10EZEX-21M + 120GB OCZ VERTEX3 MI, Graphics: Zotac NVIDIA GeForce GTX 780 3072MB (862/3004MHz), Audio: Realtek ALC1150, Network: Atheros Device e091 OS: SteamOS 1.0, Kernel: 3.10-5-amd64 (x86_64), Desktop: GNOME 3.4.2.1, Display Server: X Server 1.12.4, Display Driver: NVIDIA 352.09, OpenGL: 4.5.0, Compiler: GCC 4.7.2, File-System: ext4, Screen Resolution: 1920x1080 2: Processor: Intel Core i7-4790K @ 4.00GHz (4 Cores), Motherboard: MSI Z97 GAMING 7 (MS-7916) v1.0, Chipset: Intel Haswell DRAM, Memory: 16384MB, Disk: 1000GB Western Digital WD10EZEX-21M + 120GB OCZ VERTEX3 MI, Graphics: Zotac NVIDIA GeForce GTX 780 3072MB (862/3004MHz), Audio: Realtek ALC1150, Network: Atheros Device e091 OS: SteamOS 1.0, Kernel: 3.10-5-amd64 (x86_64), Desktop: GNOME 3.4.2.1, Display Server: X Server 1.12.4, Display Driver: NVIDIA 352.09, OpenGL: 4.5.0, Compiler: GCC 4.7.2, File-System: ext4, Screen Resolution: 1920x1080 Flexible IO Tester 2.1.13 Type: Random Read - IO Engine: POSIX AIO - Buffered: Yes - Direct: No - Block Size: 4KB - Disk Target: Default Test Directory - Result: MB/s MB/s > Higher Is Better before . 29.74 |=============================================================== AFTER .. 27.65 |=========================================================== Flexible IO Tester 2.1.13 Type: Sequential Read - IO Engine: POSIX AIO - Buffered: Yes - Direct: No - Block Size: 4KB - Disk Target: Default Test Directory - Result: MB/s MB/s > Higher Is Better 1 . 326.79 |=================================================================== 2 . 326.49 |===================================================================